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Finding the Fourth Proportional to 266,422.60, 399,860.70 and 108,764.20

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Solution

The fourth proportional to 266,422.60, 399,860.70 and 108,764.20 is: 163,238.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,422.60 : 399,860.70 = 108,764.20 : x
  2. Step 2: Convert to fraction form
    266,422.60/399,860.70 = 108,764.20/x
  3. Step 3: Cross multiply
    266,422.60x = 399,860.70 × 108,764.20
  4. Step 4: Simplify right side
    266,422.60x = 43,490,529,146.94
  5. Step 5: Solve for x
    x = 43,490,529,146.94/266,422.60
  6. Step 6: Final answer
    x = 163,238.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.